package com.gdyiko.zcwx.weixinUtils;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.net.ConnectException;
import java.net.URL;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import net.sf.json.JSONException;
import net.sf.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.gdyiko.zcwx.po.resp.Token;

/**
* 类名: CommonUtil </br>
* 描述: 通用工具类 </br>
* 开发人员： souvc </br>
* 创建时间： 2015-11-27 </br>
* 发布版本：V1.0 </br>
 */
public class CommonUtil {
  private static Logger log = LoggerFactory.getLogger(CommonUtil.class);
  // 凭证获取（GET）
	public final static String token_url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET";
  /**
   * 发送https请求
   * 
   * @param requestUrl 请求地址
   * @param requestMethod 请求方式（GET、POST）
   * @param outputStr 提交的数据
   * @return JSONObject(通过JSONObject.get(key)的方式获取json对象的属性值)
   */
  public static JSONObject httpsRequest(String requestUrl, String requestMethod, String outputStr) {
    JSONObject jsonObject = null;
    try {
      // 创建SSLContext对象，并使用我们指定的信任管理器初始化
      TrustManager[] tm = { new MyX509TrustManager() };
      SSLContext sslContext = SSLContext.getInstance("SSL", "SunJSSE");
      sslContext.init(null, tm, new java.security.SecureRandom());
      // 从上述SSLContext对象中得到SSLSocketFactory对象
      SSLSocketFactory ssf = sslContext.getSocketFactory();
      URL url = new URL(requestUrl);
      HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
      conn.setSSLSocketFactory(ssf);
      conn.setDoOutput(true);
      conn.setDoInput(true);
      conn.setUseCaches(false);
      // 设置请求方式（GET/POST）
      conn.setRequestMethod(requestMethod);
      // 当outputStr不为null时向输出流写数据
      if (null != outputStr) {
        OutputStream outputStream = conn.getOutputStream();
        // 注意编码格式
        outputStream.write(outputStr.getBytes("UTF-8"));
        outputStream.close();
      }
      // 从输入流读取返回内容
      InputStream inputStream = conn.getInputStream();
      InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
      BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
      String str = null;
      StringBuffer buffer = new StringBuffer();
      while ((str = bufferedReader.readLine()) != null) {
        buffer.append(str);
      }
      // 释放资源
      bufferedReader.close();
      inputStreamReader.close();
      inputStream.close();
      inputStream = null;
      conn.disconnect();
      jsonObject = JSONObject.fromObject(buffer.toString());
    } catch (ConnectException ce) {
      log.error("连接超时：{}", ce);
    } catch (Exception e) {
      log.error("https请求异常：{}", e);
    }
    return jsonObject;
  }
  /**
   * 获取接口访问凭证
   * 
   * @param appid 凭证
   * @param appsecret 密钥
   * @return
   */
  public static Token getToken(String appid, String appsecret) {
    Token token = null;
    String requestUrl = token_url.replace("APPID", appid).replace("APPSECRET", appsecret);
    // 发起GET请求获取凭证
    JSONObject jsonObject = httpsRequest(requestUrl, "GET", null);
    if (null != jsonObject) {
      try {
        token = new Token();
        token.setAccessToken(jsonObject.getString("access_token"));
        token.setExpiresIn(jsonObject.getInt("expires_in"));
      } catch (JSONException e) {
        token = null;
        // 获取token失败
        log.error("获取token失败 errcode:{} errmsg:{}", jsonObject.getInt("errcode"), jsonObject.getString("errmsg"));
      }
    }
    return token;
  }
  /**
   * URL编码（utf-8）
   * 
   * @param source
   * @return
   */
  public static String urlEncodeUTF8(String source) {
    String result = source;
    try {
      result = java.net.URLEncoder.encode(source, "utf-8");
    } catch (UnsupportedEncodingException e) {
      e.printStackTrace();
    }
    return result;
  }
  /**
   * 根据内容类型判断文件扩展名
   * 
   * @param contentType 内容类型
   * @return
   */
  public static String getFileExt(String contentType) {
    String fileExt = "";
    if ("image/jpeg".equals(contentType))
      fileExt = ".jpg";
    else if ("audio/mpeg".equals(contentType))
      fileExt = ".mp3";
    else if ("audio/amr".equals(contentType))
      fileExt = ".amr";
    else if ("video/mp4".equals(contentType))
      fileExt = ".mp4";
    else if ("video/mpeg4".equals(contentType))
      fileExt = ".mp4";
    return fileExt;
  }
}